diff --git a/dist/entry.js b/dist/entry.js
index 64c5c4453e..f90bf2df85 100644
--- a/dist/entry.js
+++ b/dist/entry.js
@@ -16808,7 +16808,7 @@ Entry.Utils.inherit(Entry.Field, Entry.FieldAngle);
   };
   b.applyValue = function() {
     var a = this.optionGroup.val();
-    isNaN(a) || (a = this.modValue(a), this.setValue(a), this.updateGraph(), this.textElement.textContent = this.getValue(), this.optionGroup && this.optionGroup.val(a), this.resize());
+    isNaN(a) || "" === a || (a = this.modValue(a), this.setValue(a), this.updateGraph(), this.textElement.textContent = this.getValue(), this.optionGroup && this.optionGroup.val(a), this.resize());
   };
   b.resize = function() {
     var a = this.getTextWidth();
diff --git a/dist/entry.min.js b/dist/entry.min.js
index 73f9113735..4e770ccb63 100644
--- a/dist/entry.min.js
+++ b/dist/entry.min.js
@@ -1973,8 +1973,8 @@ this._bindRenderOptions();this.box.set({x:0,y:0,width:a,height:16})};b.renderOpt
 b.y-=this.box.height/2;this.optionGroup.css({height:16,left:b.x,top:b.y,width:a.box.width});this.optionGroup.select();this.svgOptionGroup=this.appendSvgOptionGroup();this.svgOptionGroup.elem("circle",{x:0,y:0,r:49,class:"entry-field-angle-circle"});this._dividerGroup=this.svgOptionGroup.elem("g");for(b=0;360>b;b+=15)this._dividerGroup.elem("line",{x1:49,y1:0,x2:49-(0===b%45?10:5),y2:0,transform:"rotate("+b+", 0, 0)",class:"entry-angle-divider"});b=this.getAbsolutePosFromBoard();b.x+=this.box.width/
 2;b.y=b.y+this.box.height/2+49+1;this.svgOptionGroup.attr({class:"entry-field-angle",transform:"translate("+b.x+","+b.y+")"});var b=a.getAbsolutePosFromDocument(),d=[b.x+a.box.width/2,b.y+a.box.height/2+1];$(this.svgOptionGroup).mousemove(function(b){a.optionGroup.val(a.modValue(function(a,b){var c=b[0]-a[0],d=b[1]-a[1]-49-1,e=Math.atan(-d/c),e=Entry.toDegrees(e),e=90-e;0>c?e+=180:0<d&&(e+=360);return 15*Math.round(e/15)}(d,[b.clientX,b.clientY])));a.applyValue()});this.updateGraph()};b.updateGraph=
 function(){this._fillPath&&this._fillPath.remove();var a=Entry.toRadian(this.getValue()),b=49*Math.sin(a),d=-49*Math.cos(a),a=a>Math.PI?1:0;this._fillPath=this.svgOptionGroup.elem("path",{d:"M 0,0 v -49 A 49,49 0 %LARGE 1 %X,%Y z".replace("%X",b).replace("%Y",d).replace("%LARGE",a),class:"entry-angle-fill-area"});this.svgOptionGroup.appendChild(this._dividerGroup);this._indicator&&this._indicator.remove();this._indicator=this.svgOptionGroup.elem("line",{x1:0,y1:0,x2:b,y2:d});this._indicator.attr({class:"entry-angle-indicator"})};
-b.applyValue=function(){var a=this.optionGroup.val();isNaN(a)||(a=this.modValue(a),this.setValue(a),this.updateGraph(),this.textElement.textContent=this.getValue(),this.optionGroup&&this.optionGroup.val(a),this.resize())};b.resize=function(){var a=this.getTextWidth();this._header.attr({width:a});this.optionGroup&&this.optionGroup.css({width:a});this.box.set({width:a});this._block.view.alignContent()};b.getTextWidth=function(){return this.textElement?this.textElement.getComputedTextLength()+8:8};b.getText=
-function(){return this.getValue()+"\u00b0"};b.modValue=function(a){return a%360};b.destroyOption=function(){this.disposeEvent&&(Entry.disposeEvent.detach(this.disposeEvent),delete this.documentDownEvent);this.optionGroup&&(this.optionGroup.remove(),delete this.optionGroup);this.svgOptionGroup&&(this.svgOptionGroup.remove(),delete this.svgOptionGroup);this.textElement.textContent=this.getText();this.command()}})(Entry.FieldAngle.prototype);Entry.FieldBlock=function(b,a,c,d,e){Entry.Model(this,!1);this._blockView=a;this._block=a.block;this._valueBlock=null;this.box=new Entry.BoxModel;this.changeEvent=new Entry.Event(this);this._index=c;this.contentIndex=e;this._content=b;this.acceptType=b.accept;this._restoreCurrent=b.restore;this.view=this;this.svgGroup=null;this._position=b.position;this.box.observe(a,"alignContent",["width","height"]);this.observe(this,"_updateBG",["magneting"],!1);this.renderStart(a.getBoard(),d)};
+b.applyValue=function(){var a=this.optionGroup.val();isNaN(a)||""===a||(a=this.modValue(a),this.setValue(a),this.updateGraph(),this.textElement.textContent=this.getValue(),this.optionGroup&&this.optionGroup.val(a),this.resize())};b.resize=function(){var a=this.getTextWidth();this._header.attr({width:a});this.optionGroup&&this.optionGroup.css({width:a});this.box.set({width:a});this._block.view.alignContent()};b.getTextWidth=function(){return this.textElement?this.textElement.getComputedTextLength()+
+8:8};b.getText=function(){return this.getValue()+"\u00b0"};b.modValue=function(a){return a%360};b.destroyOption=function(){this.disposeEvent&&(Entry.disposeEvent.detach(this.disposeEvent),delete this.documentDownEvent);this.optionGroup&&(this.optionGroup.remove(),delete this.optionGroup);this.svgOptionGroup&&(this.svgOptionGroup.remove(),delete this.svgOptionGroup);this.textElement.textContent=this.getText();this.command()}})(Entry.FieldAngle.prototype);Entry.FieldBlock=function(b,a,c,d,e){Entry.Model(this,!1);this._blockView=a;this._block=a.block;this._valueBlock=null;this.box=new Entry.BoxModel;this.changeEvent=new Entry.Event(this);this._index=c;this.contentIndex=e;this._content=b;this.acceptType=b.accept;this._restoreCurrent=b.restore;this.view=this;this.svgGroup=null;this._position=b.position;this.box.observe(a,"alignContent",["width","height"]);this.observe(this,"_updateBG",["magneting"],!1);this.renderStart(a.getBoard(),d)};
 Entry.Utils.inherit(Entry.Field,Entry.FieldBlock);
 (function(b){b.schema={magneting:!1};b.renderStart=function(a,b){this.svgGroup=this._blockView.contentSvgGroup.elem("g");this.view=this;this._nextGroup=this.svgGroup;this.box.set({x:0,y:0,width:0,height:20});var d=this.getValue();d&&!d.view&&(d.setThread(this),d.createView(a,b),d.getThread().view.setParent(this));this.updateValueBlock(d);this._blockView.getBoard().constructor!==Entry.Board&&this._valueBlock.view.removeControl()};b.align=function(a,b,d){var e=this.svgGroup;this._position&&(this._position.x&&
 (a=this._position.x),this._position.y&&(b=this._position.y));var f=this._valueBlock;f&&(b=-.5*f.view.height);f="translate("+a+","+b+")";void 0===d||d?e.animate({transform:f},300,mina.easeinout):e.attr({transform:f});this.box.set({x:a,y:b})};b.calcWH=function(){var a=this._valueBlock;a?(a=a.view,this.box.set({width:a.width,height:a.height})):this.box.set({width:15,height:20})};b.calcHeight=b.calcWH;b.destroy=function(){};b.inspectBlock=function(){var a=null;if(this._originBlock)a=this._originBlock.type,
diff --git a/src/workspace/field/angle.js b/src/workspace/field/angle.js
index 6f88a03bf7..9474df7c32 100644
--- a/src/workspace/field/angle.js
+++ b/src/workspace/field/angle.js
@@ -206,7 +206,7 @@ Entry.Utils.inherit(Entry.Field, Entry.FieldAngle);
 
     p.applyValue = function() {
         var value = this.optionGroup.val();
-        if (isNaN(value)) return;
+        if (isNaN(value) || value === '') return;
         value = this.modValue(value);
         this.setValue(value);
         this.updateGraph();